My current project is for dspic33FJ128GP802, and has an 8000 byte, a 1024 byte, and 2048 byte arrays, but that’s not PBP.
(I say current, but I think it’s finished now).

I was wandereng if PBP needs a 2D graphics library. To port mine easily would need a single linear, easily accessed 1024 byte array.

I do remember one being posted years ago, and think that included lines and shapes, etc.
But then there have been consistent questions about getting mono graphics displays working over the years also,
such as a recent one, but granted, that was only about the interface.

It isn’t for any project of mine, but might be fairly easy to port for others. It’s contingent on some PBP supporting a 1024 byte array, because unlike most gfx libs,
The frame buffer is already in the format of the display when it’s sent to the display.
It’s the pixel functions that write into the frame buffer in a manner that accommodates the vertically stacked byte arrangement for some LCDs (and possible OLEDs).